Maharishi

Maharishi, or maharsi, is a Sanskrit word typically used as an honorary title which is added onto the name of an enlightened spiritual teacher. It can be applied to an awakened yogi and has been bestowed upon many figures who were central to the yoga tradition.

The term is derived from the roots maha, meaning "great," and rsi, meaning "seer." It has been used in English since the 18th century and usually refers to a Hindu or Vedic guru with great mystical knowledge.

Yogapedia explains Maharishi

When used as an honorary title, maharishi can be used by anyone. Probably the most famous person to use this title in the West was Maharishi Mahesh Yogi, who pioneered transcendental meditation and offered spiritual advice to many celebrities. He almost always recommended yoga practice as a means of accelerating spiritual growth.

Maharishi is also used to mean “poet,” “spiritual leader,” “holy person" or “wise man." Additionally, the word is used to describe the seers that are mentioned in Vedic texts, or the seven rishis that are referred to in the "Rig Veda."